add spec for Ajax::FriendController

spec/controllers/ajax/friend_controller_spec.rb

@@ -0,0 +1,161 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+describe Ajax::FriendController, :ajax_controller, type: :controller do
+  let(:user) { FactoryBot.create(:user) }
+
+  describe "#create" do
+    let(:params) do
+      {
+        screen_name: screen_name
+      }
+    end
+
+    subject { post(:create, params: params) }
+
+    context "when user is signed in" do
+      before(:each) { sign_in(user) }
+
+      context "when target user exists" do
+        let(:target_user) { FactoryBot.create(:user) }
+        let(:screen_name) { target_user.screen_name }
+
+        let(:expected_response) do
+          {
+            "success" => true,
+            "status" => "okay",
+            "message" => anything
+          }
+        end
+
+        it "creates a follow relationship" do
+          expect(user.friends.ids).not_to include(target_user.id)
+          expect { subject }.to(change { user.friends.count }.by(1))
+          expect(user.friends.ids).to include(target_user.id)
+        end
+
+        include_examples "returns the expected response"
+      end
+
+      context "when target user does not exist" do
+        let(:screen_name) { "tripmeister_eder" }
+
+        let(:expected_response) do
+          {
+            "success" => true,
+            "status" => "okay",
+            "message" => anything
+          }
+        end
+
+        it "does not create a follow relationship" do
+          expect { subject }.not_to(change { user.friends.count })
+        end
+
+        include_examples "returns the expected response"
+      end
+    end
+
+    context "when user is not signed in" do
+      let(:screen_name) { "tutenchamun" }
+      let(:expected_response) do
+        {
+          "success" => false,
+          "status" => "fail",
+          "message" => anything
+        }
+      end
+
+      include_examples "returns the expected response"
+    end
+  end
+
+  describe "#destroy" do
+    let(:params) do
+      {
+        screen_name: screen_name
+      }
+    end
+
+    subject { delete(:destroy, params: params) }
+
+    context "when user is signed in" do
+      before(:each) { sign_in(user) }
+
+      context "when target user exists" do
+        let(:target_user) { FactoryBot.create(:user) }
+        let(:screen_name) { target_user.screen_name }
+
+        before(:each) { target_user }
+
+        context "when user follows target" do
+          let(:expected_response) do
+            {
+              "success" => true,
+              "status" => "okay",
+              "message" => anything
+            }
+          end
+
+          before(:each) { user.follow target_user }
+
+          it "destroys a follow relationship" do
+            expect(user.friends.ids).to include(target_user.id)
+            expect { subject }.to(change { user.friends.count }.by(-1))
+            expect(user.friends.ids).not_to include(target_user.id)
+          end
+
+          include_examples "returns the expected response"
+        end
+
+        context "when user does not already follow target" do
+          let(:expected_response) do
+            {
+              "success" => false,
+              "status" => "fail",
+              "message" => anything
+            }
+          end
+
+          it "does not destroy a follow relationship" do
+            expect { subject }.not_to(change { user.friends.count })
+          end
+
+          include_examples "returns the expected response"
+        end
+      end
+
+      context "when target user does not exist" do
+        let(:screen_name) { "tripmeister_eder" }
+
+        let(:expected_response) do
+          {
+            "success" => false,
+            "status" => "fail",
+            "message" => anything
+          }
+        end
+
+        it "does not destroy a follow relationship" do
+          expect { subject }.not_to(change { user.friends.count })
+        end
+
+        include_examples "returns the expected response"
+      end
+    end
+
+    context "when user is not signed in" do
+      let(:screen_name) { "tutenchamun" }
+      let(:expected_response) do
+        {
+          "success" => false,
+          "status" => "fail",
+          "message" => anything
+        }
+      end
+
+      include_examples "returns the expected response"
+    end
+  end
+end